Cooler for uniting oils in the manufacture of lard



(NoMqd'eL) S. H. GOGHRAN.

COOLER PdR UNITING OILS IN THEIVMANUPAGTURE 0F LARD, 6w. No. 291,692. a? N Patents d Jan. 8, 1884.

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UNITED STATES PATENT EQFFICE;

SAMUEL H. COCHRAN, OF EVERETT, MASSACHUSETTS.

COOLERFOR UNITI NG OILS IN THE MANUFACTURE OF LAHD, 8&6.

SPECIFICATION forming part of Letters Patent No. 291,692, dated January 8, 1884:.

Application filed Juno 30, 1883. (No model.\

To all whom it may concern:

Be it known that I, SAMUEL H. COGHRAN, a citizen of the United States, residing at Everett, in the county of Middlesex and State of Massachusetts, have invented an improved cooler for uniting oils in the manufacture of purola, lard, or any product embracing animal and vegetable oils and fats, of which the following is a specification.

The invention relates to a machine for uniting, tying and cooling liquid fats and oils, and the process thereof, after they have been rendered; and it consists of a box in form like an ice-chest, and having in the top part there of an ice-box open at the top, and below the ice-box 1 a circular conveyer extending the length of the ice-box and parallel to it, and open at the top, inwhich conveyer revolves a hollow shaft running lengthwise of the box, having a sleeve thereon, carryinga worm-like circularfloat or screw, in form likeArchimedes screw. Into one end of this conveyer are in troduced liquid fats and oils through a pipe which extends from the rendering-reservoir or mixing-tank to said conveyer, and when the liquid fats and oils have passed into the conveyer the screw or float in its revolution takes the contents along to the end of the conveyer and passes it out through a cock or conductor. The object of the invention is to unite and permanently fix and set animal and vegetable oils and fatsin their varied compounds by means of cool dry air circulating over and around said conveyer, in which said oils and fats have been allowed to flow, so at the outflowing-cock they will have become united, cooled, and ready for marketable packages. I have found in certain conditions of atmosphere that said oils and fats would not perfectly unite; but by my machine and process I'am enabled to unite said oils and fats in an condition of the atmosphere. And that others may better understand the nature and use of my invention, reference is hereby made to the accompanying drawings, and to the letters of reference thereon, which are made a part of this specification, in which- Figure 1 represents a side elevation of the machinewith a portion of the box removed to show the devices within. Fig. 2 is a vertical section of the same, taken in line a: w.

The letter A represents the sides and bottom of the exterior box; B, the sides and bottom of the interior box; 0, the icebox; D, the cover of box-A B; E, the conveyer; F, the hollow shaft; G, the cylinder or sleeve surrounding the shaft; H, thescrew or continuous float; I, the pulleys on shaft F; J, a pipe leading to rendering-receptacle; K, cock or conductor to draw the contents from the conveyer; L, a steam-cock in the hollow shaft F; N, a window in the exterior box; a, an inclined bottom of the ice-box; b, dripping pipe c, dripping trough or gutter to catch the condensed moisture on the outside of the ice-box, and (1 its dripping-pipe; e, stuffing-boxes of the shaft'F; f, stopcock in pipe J g, a perforated shelf on which rests the ice, the perforations not shown.

It willbe observed that the box A,.as shown in the drawings, is nearly rectangular. At one end is seen the inflowing-pipe J. This pipe extends to the rendering or mixing reser voir,which may be in another room or at any convenient place, so that when the cock f is opened the liquid fats and oils will flow into one end of the conveyer E. (Shown in Fig. l.)

The conveyer extends the entire length of the box B, and is fastened to the same at its ends. It is water-tight, and is made of metal, having about it a jacket or other support to keep it stiff. In this is turned the screw H, which fits closely to the conveyer. (See Figs. 1 and 2.) As the fats and oils are passed in through the pipe J, the same are carried along by the screw gradually to the end and pass out through the cock K. F is a hollow shaft, upon which is the sleeve G, secured to the same in any convenient manner. The shaft passes through the ends of the boxes A and B and the conveyer E, and at e are stuffing-boxes and packing, so there shall be no leakage.

I represents the pulleys upon which run the belts that move the machine. The shaft F is hollow for the purpose of introducing steam or hot water when it is necessary to heat the conveyer, sleeve, and float, or to cleanse the same, and is connected by a steam-pipe to the steam or hot-water reservoir, and is regulated by the stop-cock L.

Above the conveyer is seen, Fig. 2, the ice box 0, and this extends the length of the box B, and is secured to the same at its ends. The bottom is inclined, so the waste water will run off through the dripping-pipe b.

c is a gutter on the ice-box. This catches the condensed water on the outside of the icebox, and the same is carried off through the dripping-pipe d. The box A opens by the cover I) into the interior at the top. It will be observed that there is open space all around the interior of box B, and an open space between the ice-boX and the conveyer. The cold air arising from the ice in box 0 will flow out and down the side of the box in the direction indicated by the arrows, and then up into iceboX again, and in this way a current of air will be created, which will flow between the ice-box and the conveyer along over the liquid fats and oils, as well as around the conveyer, and as the oils and fats are forced along the conveyer by the screw the cold air will cause the oils and fats gradually to unite, and they will become fixed and tied permanently before they are forced out through the cock K, cooled and thickened, into a reservoir to receive the same.

Hitherto I had found no way of causing vegetable and animal oils and fats to unite incertain conditions of the atmosphere; but by this machine I can tie and fix the oils permanently in any condition of the atmosphere, and the uniting and fixing the oils is accomplished by the currents of dry cold air flowing over and around the conveyer, while the fats and oils are in constant motion by the revolution of the screw. In practice the coolingbox may be of any desired length and size.

I am not confined to having the conveyer and ice-box arranged as above, or in the same apartment, as above described. Cold air can be obtained in other ways than flowing directly from ice, as by the use of chemicals and other known ways of producing 'cold currents of air; but I have found the best and most economical results by the machine and process above described; nor do I confine myself to the form of the conveyer and screw, as in other ways the compound may be brought in contact with cold air; but this form or method of uniting the oils and fats has seemed to me the most economical and convenient.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In the cooler A B D, having therein an ice-box, O, the combination of the conveyer E, the hollow shaft F, the sleeve G, the screw H, the pipe J, and the cock K, substantially in the manner and for the purpose shown and described.

2. The combination of the coolerA B D, having therein an ice-box, O, the conveyer E, the shaft F, the sleeve G, the screw II, the pipe J, the cock K, the stuffing-boxes e, and the pulleys I, substantially in the manner and for the purpose shown and described.

3. The method or process of tying and permanently uniting oils and fats by means of dry cold air, which consists of passing the oils and fats, drawn by a tube from the oil reservoir or tank into a conveyer arranged in a cooler having therein an ice-box filled with ice, in which conveyer revolves a screw, which moves along and constantly agitates said oils and fats, while they are subjected to a current of dry cold air flowing from said ice-box over and around said oils and fats, until they are permanently set and tied, substantially as shown and described.

SAMUEL H. OOCHRAN.

\Vitnesses: 7

J. L. NEWTON, J OHN WARE. 

